Zacharias Cornelisz (d. ca. 1640) was a Mennonite publisher and printer at Hoorn, Holland, from whose presses appeared a number of Mennonite books beginning not later than 1609, including works by Menno Simons, Hendrik Alewijnsz, Dirck Gerrits, and P. J. Twisck. He published the first issue of Menno's book against Jan van Leyden (written in 1535) without a name. He also published in 1627 P. J. Twisck'sKleyn Liedtboecxken and other theological works of this author, and some Mennonite songbooks, as well as two editions of the martyrbooks: Historie der warachtige getuygen J.C., in 1617, and Historie van de vrome Getuygen J.C. . . . , 1626.

After his death his sons Jan and Pieter continued the printing shop. Pieter Zachariasz (Sacharyesen), who later took the family name of Hartevelt (Harteveldt), also published Mennonite books, e.g., the 1644 and 1657 editions of the hymnal Kleyn Hoorns Liet-boeck. Of some of these and other editions Zacharias Cornelisz and his sons were not the printers, but only the publishers. Pieter Zachariasz Hartevelt also published the portrait of Menno Simons by J. van de Velde.

Zacharias probably he belonged to the Old Frisian church at Hoorn, of which P. J. Twisck was an elder. He must have died before 1640.